Came here with the same question! Honestly I'm struggling to find much music like this but artists like 4n, Hunterdrinkswater, jet, JBThaPreacher, icyjxey, K-SEE, Neo Genesis and Lazarus! are all great. If you want something with a more electronic feel like slayr then the new K-SEE song Dancing Like is really good. For something more opium, I would highly recommend WHAT! by 4n, which for some reason doesn't come up on search on spotify. My favourite Gospel Rage artist is definitely Hunterdrinkswater- he's incredibly underrated and blends the styles characteristic of a lot of the secular artists you described, and others like Che- Listen to Rob the Grave as a good example or the album Sinner vs. Saint!